<template>
  <view>
    <!-- 使用自定义的搜索组件 -->
    <my-search @myclick="gotoSearch"></my-search>
    <view class="scroll-view-container">
      <!-- 左侧滑动区域 -->
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
        <block v-for="(item,index) in cateList">
       <view :class="['left-scroll-view-item',active === index?'active':'']" @click="activeChange(index)">
        {{item.cat_name}}
       </view>
        </block>
      </scroll-view>
      <!-- 右侧侧滑动区域 -->
<scroll-view scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
  <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
    <!-- 二级分类标题 -->
   <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
   <!-- 当前二级分类下的三级分类列表 -->
   <view class="cate-lv3-list">
     <!-- 三级分类的item项 -->
     <view class="cate-lv3-item" v-for="(item3,index3) in item2.children" :key="index3" @click="gotoGoodsList(item3)">
       <!-- 三级分类图片 -->
       <image :src="item3.cat_icon"></image>
       <!-- 三级分类文本 -->
       <text>{{item3.cat_name}}</text>
     </view>
   </view>
  </view>
</scroll-view>
    </view>
  </view>
</template>

<script setup>
import { ref } from 'vue'
import {onLoad} from '@dcloudio/uni-app'
import { onShow } from '@dcloudio/uni-app';  
import { useTabBarBadge } from '@/hooks/tabbar-badge.js'; 
  
const { onPageShow } = useTabBarBadge();  
  
// onShow(onPageShow); // 在页面显示时调用 onPageShow  
onShow(()=>{
  onPageShow()
})
        // 当前设备可用高度
        const wh =ref(0) 
        const cateList =ref([])
        const active = ref(0)
        const scrollTop =ref(0)
        const cateLevel2 =ref([])
    onLoad(()=>{
      const sysInfo = uni.getWindowInfo()
      wh.value = sysInfo.windowHeight-50
      getCateList()
    })
      // 获取分类列表的数据
      const getCateList = async ()=>{
        const res = await uni.$http.get('api/public/v1/categories')
        if(res.data.meta.status!==200) return uni.$showMsg()
        cateList.value = res.data.message
        cateLevel2.value = cateList.value[0].children
      }
      const  activeChange = (index)=>{
        active.value = index
        scrollTop.value = scrollTop.value ===0?1:0
        cateLevel2.value = cateList.value[index].children
      }
      const gotoGoodsList = (item)=>{
      uni.navigateTo({
        url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
      })
    }
    const gotoSearch = ()=>{
      uni.navigateTo({
        url:'/subpkg/search/search'
      })
    }
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
  .left-scroll-view{
    width: 120px;
    .left-scroll-view-item{
      background-color: #f7f7f7;
      line-height: 60px;
      text-align: center;
      font-size: 12px;
      &.active {
        background-color: #fff;
        position: relative;
        
        &::before{
          content: ' ';
          display: block;
          width: 3px;
          height: 30px;
          background-color: red;
          position: absolute;
          top:50%;
          left: 0;
          transform:translateY(-50%);
        }
      }
    }
  }
  .cate-lv2-title{
    font-size: 12px;
    font-weight: 700;
    text-align: center;
    padding: 15px 0;
  }
  .cate-lv3-list{
    display: flex;
    flex-wrap: wrap;
    .cate-lv3-item{
      margin-bottom: 10px;
      width: 33.33%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text{
        font-size: 12px;
      }
      image{
        width: 60px;
        height: 60px;
      }
    }
  }
}

</style>
